Process of slotting metals



Feb. 1Q. 1925. 1,525,721

c. J. coBERLY PROCESS OFSLOTTING METALS Filed sept. ll, 1925 ATToRn/E 66'.

,Paantea Feb. 1o,'1925. y

Uniti-:n s'rAri-:fs

PATE-NT OFFICE.

IPRormss-or sLo'r'rING METALS;

Application led September To all 'w1/10mi# may concern.

Be it known that I, CLARENCE J COBERLY,

a citizen of the United States, residing at -Los Angeles, in the county ot Los Angeles and State .of California, have invented a `new and useful Process of SlottingqMetals, of which the following is a specification.

My invention relates to 'the art of cutting metals and more *particularlyte the art of cutting metals with a gas torch.

. In this art an oxygen `jet`is utilized, this jet being preferably directed through the metal to be cut, forming therewith, a slag which is thrown out of the cutl by the force of "the jet, the resultbeingafthin cut through the 'materiah In one application of the cutting torch, it is desired to produce a slot in plates, pipe, or the like, and my invention 1s particularly applicable to such' cutting.

It is an object of my inventlonto provide means by which a slot of substantially uniform cross section and .any desired length may be cut i-n any fusible metal or material.

Further objects and advantages Willbe made evident hereinafter.

.Referring tothe drawing which is for illustrative` pur ses only,

Fig. 1 is a iagramrnatic vieWshoWi-ng a cutting torch and itsv method of operating 'pon theinaterial, which is shown in sec- `.tion.

Fig. *2 is an elevation ot' the material prior to cutting, the desired slot being shown in 1 dotted lines. y j 1 y Prior to my invention it has been found very 'difiicult to 'cut slots of uniform Width i n any sort of plate material due to the fact that it is hardv to get the slot started 'Withi0 out cutting avho'le of larger diameter than the desired slot.

In the practice of my invention I drill in the material 10which it -is Adesiredto cut, a cylindrical'hole 11 wllien preferably paes rk-enltirely through the material and which l "mo ing s id burner to 11, 1923. serial'nn. esame.

i" is of the same diameter as the .slot to be cut or preferably of a slightly smaller diameter. I then direct the cutting jet 12 from the `tip 13 'of a cutting torch 14; through the holefas shownin Fig. 1, the oxygen uniting 'with the metal and thro it out in the form of slag as lshown irilflgg. 1.i As ,soon as the metal has become suflicientl heated to `form slag, I move the tip 13 a ongft/li line www of Fig. 2, thus cutting a slo'as -shown at 20. vBy ,this method I am ab e to cut slots which are substantially uniform in thickness thoughouttheir length, which slots can be made of any desired length.

I claim as my invention:

1. A process for cutting slots of uniform Width in metal members "which comprises.: drilling a' holeto provide'fa starting point for the slot; forcing a cuttirr `flame through said hole (from a suitable b'urner; and then cause said ame t6 ycut thetlesired slot. y

,2., A lprocess for cutting l`:openings in metal members which comprises: mechanically forming a hole extending entirely through said metal member; heating the `-walls of said hole up to the point Where'the.

` metal will readily combine with a. cutting gas; and then enlarging said hole tol form the desired opening by' directing a jet of` said cutting gas through said hole.

3. A process 4for cutting slots in a metalV member 'which cmprises: drilling a hole entirely through the metal member; heating the walls ofthe hole up to a`point where the metal Will readily combine with a cutting gas; passing a. jet .of .said cutting gas through the hole td start combustion therei111;-and then moving said jet to form' s/aid S Ol); Y' i In testimony whereof, lhaafe hereunto 'set' m hand at Los Angeles, Galifornia,"'this fit1 day of September, 1.923.VVV 'i CLARE-NGE J. COBE LY. 

